Mining machine



March 4, 1930. E, DOBERSTEIN 1,749,069

MINING MACHINE Filed Dec. 29, 1925 5 Sheets-Sheet 2 Ma. aw ML\ March 4, 1930.

Filed Dec. 29, 1923 E; J. DOBERSTEIN MINING MACHINE flllllllll-llllf ii 5 Sheets-Sheet 3 Edgar/d Llflpiezasiv/ March 4, 1930.

E. J. DOBERSTEIN 1,749,069

MINING MACHINE Filed Dec. 29 1923 5 Sheets-Sheet 4 March 4, 1930. Rs'i' m 1,749,069

MINING MACHINE Filed Dec. 29, 1925 5 Sheets-Sheet 5 The; mining machine comprises a mam frame 1 supported on "axles 2,2, having ,flanged wheels'3,3 for movementalong-the mine ":track 1n. theusual manner.

Patent ed Mar. 4, 1 930 matte 1 U ITED PATENT OFFICE E WAR J. DOBERSTEIN, OFVBLUE ISLAND, 'ILL'INois, ASSIGNOR T GOODMAN MANU- r'AGTURING-O MPANY, "or orI oAGo', 'ILLINors, CORPORATION OF'ILLINOIS MINING MACHINE Application filed December 29, 1923. Serial No. 683,330.

I This inventioiilrelates to mining machines andmore particularly to mining mach nes theovercuttingor slabbing type in which ment and elevating mechanism.

.a cuttingelement is mounted for angular movement on a Wheeled support. One of .the objects of .thisinvention is to provide an improved construction of the cutting ele- A further object is-to provide an improved construccutter. element to the coal. v

Theinvention may be best understoodbv tion in the operating gearing forffeedingthe reference to the accompanying drawings which illustrate one form in which it may be embodied. I e V i In these drawings o I 1 Figure ;1 is a side view off a: mining machine constructed according to my invention;

'Figure-2 is a plan view of the machine drawn,toQa somewhat larger scale than Fig- ;ure land With parts broken away to show, portions ofthe mechanism; K

' ,Figure 3 is a viewg in part longitudinal :sectionjbut: showing the cutting element and the/elevating devices thereon in full;

v Figure dis an; enlarged sectional view of the cutting element taken on line 44 of Figure 2. I

Figure 5 is rear view of the cutting elementwvithparts broken away 3 .F'gure 6 is a transverse section ofthe cutting element taken on line 6-6 of Fig- Figure 7 is across section offhefeed gear- :ingtaken on line 7-7 o-fEignre 2';

Figure 8 is a;detail View of another portion-of the feed gearing. taken on line 88 of FigureQ.

. Referring nowto detailsillustrated in the drawings I {table i having pivotalf bearing.v on a stud 5 -integral with the main frame. as shown herein, these supports comprise a pair of 7, of I -beam sections 15, (see Figureti) spaced apart toform a longitudinal slot 16 oppositely disposed frames 6, 6, eaeh having hereinafter appear..

Referring-now to details of construction of the cutting element, it will be observed that it CODIPIlSGs an independent unit having .as its main elements a cutting arm '9. a

main casing 10, and a motor casing 11. The cutter ,arm 9 18 provided with a guide- .way 12 for a cutter chain of the usual type (not shown) and is attached to the forward or outer end of the frame 10 and eccentricallyt thereof, the arrangement being such that theentire cutting element maybe inverted when desired so that the cutter arm may be either at the extreme top of the cutting element, as shown in Figure 1, or in inverted position at the bottom ofthe cutting elementand nearer the base frame, as shown in Figure 8. The cutter arm is supported on a bracket-.13 formed integral with the mam frame. As herein shown the cutter arm 1s provided with a pair and with a pair of oppositely disposed gibs 17, 17, secured .to the outer flanges of the I-beamlnembers to form the cutter chain slot 12. The lower surface of the bracket 13 isprovided with a longitudinally arrangedtongue 18, adapted to fit in the slot 16' formed'in the cutter arm, and a pair'of parallely arranged projections 19, 19 on the opposite sides of said central tongue, adapted to fitinftherecessed portions of the I-beams 15, 15. A pair of straps 20, 20, bear along :the lovver surfaces of the I-beam members opposite theprojections 19, 19,.and a plurality of bolts 21 21, pass through said straps andI-beam members and are threade'din ;the pr.o]ections 19, 19, tosecuretbe cutter arm in position; Suitable longitudinalslots 4 22, 22,.as, indicated in Figuree, maybe provided in the I-beam sectionsto ail'ordlongitudinal adjustment of the cutterarm respeCQ in linewith the cutter arm in positiontoengage the cutter chain in the usual manner.

As shown herein, said sprocket "is integral with a hub 27 keyed on said shaft. A beveled gear28 is carried at the upper end of the shaft and is meshed with a beveled pinion 29 keyed on longitudinal shaft 30. A pinmeshed with armature pinion 32 of the motor 11 As shown herein, a motor 11 is enclosed'in the motor casing 11 at the rear end of the main frame 10, and arranged to be removable from said frame without distion of the elevating mechanism, which will be hereinafter more fully described; As

. shown in Figure 5, the motor casing 11' is preferably provided at each side with a pair of oppositely disposed guiding members 85,

35, adapted to engage the wing members-34, 34, and provide a rigid connection therewith, but permittingrearward sliding movement of the motor casingwhen it is desired to remove the same from the frame. Said casing is detachably connected by suitable means,

' such as the bolts36, 86, as shown in Figures uprights 7, 7f Shafts 3 and 5. The motor maythus' be quickly removed from the cutting element for replacement or repair.

Referring now todetails of the elevating mechanism, whereby the cutting element is adjusted vertically of the supporting frames 6, 6,1 provide a pair of pinions 40, 40 on a shaft 41 arranged longitudinally of each side shaft 49 and the motor driven shaft 30 is pro-5 vided by means of a clutch member 50 feathered-on the shaft 49 and engaging a co-op-' See Figure 6) erating clutch 51 rotating integrally with a Worm gear 52. The latter 'gearis meshed with a worm 58 keyed on the. forward end of the shaft 30. I

It Will be observed that the bearings 44,.

44 and 45 45, for shafts 41,41, are split on a vertical plane and detachably secured by;

bolts 55,55. (See Figure 5). Similarly, the worm gear housings 46,46 are split on-a ver- 5 tical plane and detachably secured by the bolts 56, 56. (See Figure 6). By means of this arrangement the entire shafts 4l with tl1eir pinionsand worm gears maybe quickly detached at either side by removing the supporting frame 6 and then removing the t I bearings 44, 44 and 45; 45, and-housing 46. ion 31 at the rear end of the latter shaft is The elevating mechanism 1112137418 be operated by hand from either sideof the'machine V by the application of a crank or similar suitable means to. the squared projections 57, 57

on the transverse shaft 49, extendingv through the housing 46, 46.

The operation or the elevating mechanism Wlll be clear from the description of the above mechanism,it being understood that the'clutch member 50 is normally disengaged I i from the coacting clutch member 51, in which positionthe elevating mechanism is inopera;

tive and locked against vertical movement by reason ofthe pitch of the worm gear 47 and the. worm 48. Sufficient leverage may be provided means of a crank, however, to overcome the locking actlon of these gears when it is desired to operate the elevating mechanism by hand; In order to actuate the as Y mechanism in'either direction by means of i the motor the clutch member 50 is thrown into engagement with the clutch member 51.

The direction of movement of the'elevating ,mechanism is controlled by the direction of machine, illustrated especially in Figures 7" and 8, it will be seen that I provideaimotor 60, mounted at the rear end of the main frame and provided with an armature pinion 61, engaging a gear 62-0n the 'transverseshaft 63. Said sharpens bearing in a bracket 64 mounted on the main frame adjacent the gear 62, and. a bracket 65 at theyopposite end of the shaft. .Two separate trains of gearing are driven from the shaft- .63, one-beingfo'n I feeding the cutter arm to the work through the medium of the turntable 4, which-is frame, as hereinbefore described. A flexible cable drum is alsodriven from this gear: train. The second train of; gearing is for driving the axle 2- and the supporting wheels 3 to; propel the-machine from place to place.

"As shown herein the feed and cable drum gear train comprisesa pinion 68 keyed ona mounted for. angular movement on the main I l shaft 63 ,:and meshed with A a g-g'ear 1,69 zloosely nounted on a countershaft s70. Thisshaft hasbearing in ,the bracket .65Vat one endand in a housing ;71 at the other end. Thegear 69 iskeyed on a pinion 72 meshed'with a gear "73-keyed on asleevel 74 looselytmounted on e the shaft 63. A piniont75 is keyed on the opposite endof sleeve 74,;an-d'is meshedzwith vla gea'r .16 on aisleeve s77 loosely mounted on.

ving clutch teeth QIIOPPOSltB sides thereof is feathered. on shaft. 70 forselective engage shaft 7 O. A sliding clutch member v7.8 havn1ent=with co-actin g jaws on pinion 72'qor sleeve 77. In Figure V7'the clutch 1ne1nber'78 bis showninthe neutral position. ,The arrangement is such that when thrown to the left. it will engage pinion 72. Shaft will :then bedriven throughlgears 68,69 and Y72.

Whentheclutch member78 is thrown inthe opposite directionto engage with the sleeve 77, t'he'shaft'70 will be-driven-ata lower speed through the members 68, 69, 72,73,

74, T5, 76 and 77. A worm 80 is carried by thez'shaft 7O.v -This worm engages a worm gear 81, as shown inFigure'S; Said worm gear is secured to a hub'82 loosely mounted I' on a clutch sleeve '83.

An annular :collar 84 is spaced fromthe lower face of the hub 82 but secured to rotate therewith through "a pluralityiof connectingpins arranged at intervals around the periphery thereof. Anf annular ring186 is keyed to th-e clutch sleeve "83 and is secured in frictional" engagement 1,;betweenthe ,hubi82 and the collar 84. I A frictional driving connectionis thus provided between the clutch sleeve 83 and the two members- 82 land 84, by means of tension on the pins;85 =maintainling a frictional contact" by sai'd members onopposite sides o'f the 'ri-ng 86. As shown herein, a pairof bearing rings 87,87 maybe interposedbetween the friction members to take up-wear.

The clutch collar 83 is loosely mountedon 1 a vertically disposed'sha'ft ;90. -A longitudinall y: movable clutch ;member 91 is also L I mounted on said shaft belowthe cluteh sl'eeve a 583 and is provided with a-plurality of clutch P 1 segments 92,92, extending upwardly through apertures 93, 93, formed in the clutch sleeve 83. 'Clutch'sleeve 83-and clutch member 91 therefore rotate together emu times. The

. :u'p'per; ends of the clutch segments 92, :92, are adaptedto engageclutch jaws 95 carried in-a {sleeve 96 keyed o'n-theupp'er. end of the shaft 90. {A- pinion v 101 iskey'e-d at the lower-end .ofshaft 90 and is meshed with a gear 102 on jthe stud 103. A gear pinion'lO ismounted to rotate: with theffgear 102 and drives a toothed rack105 formed about the periphery of the turntable tx p I 3 By means of the gearingjust described, the turntable with i'tscuttingelement maybe fed "to the coal by swinging thesame angularly on the base 1. -This angular-movement may be madegatgtwo speeds by reason of: the selective gearing included in :the train as described. :By' reason of the frictional I drive through members 82,;84land .83,ithe;am ount of effective power! delivered to feed. the cutter arm may be limited sothat in case unusually hard cutting .is :encountered,-the friction clutchv will slip, and thus'protect the parts-from damage ingthe cutter arm to the coal to make aslabbing cut with said arm arranged at substantially right angles to cut along one side of the track. 'The rope drum is loosely mounted onia stud 111 forming a part of the: imainiframe. and is provided ,at'its-yupper. surface with a plurality of clutch aws 112' adaptedrtobepengaged by the clutchmember 91 when the latter is moved downwardly.

Meansi-are ralsorprovided for affording a- .positive lock against angular movement of l1h6 cutting element. This means comprises an arm -.98 (see Figure 2) hinged to the'gear casing.99,and .adaptedto :fit in aslot 100 *formed at the uppe rend of the sleeve 93." Since the latter sleeve is :keyed on the drive 1 shaftg90, the gearing;beyondithispoint may bellocked, including the turntable .4, which is driven'thereby; lnthegarrangement shown, 'it will beobservedthat thezfriction device,

comprising-thes-members 82,18 1 and'83, is

interposed between this locking mechanism and'ithe motor, vso that-,invcase it is. attempted inadvertently .to drive'the shaft 90 when it aislocked,the vfriction;clutch- :will slip, and' thus protect the parts from breakage. When the arm' 98 is raised *fromthe slot 100 the sleeve 93 and: the shaftare free torotate and drive .the gearing associated with the :turna table for feedingith-ecutter arm in the-usual manner.

"P'Ihe-trainof gearing for driving the axles and :wheels comprises a clutch sleeve 113 Keyed thereon is'a chain sprocket adapted to drivethe chain 121,-operativelyc0n- .nectedzwith an axle sprocket'122, on the axle A "brakeidrum "123 is'also-mounted upon the sleeve 113 and isprovided withv abrake :band -12Lof1 the usual "type. The arrangement such-thatwhen-the clutch 'll'tis thrown into z-ofperative engagement with the "sleevei113,rthesleeve andbrake drum thereon, I

:loosely mounted on the I shaft 63, having I clutch jaws 116,116 ada-pted ffor engagement" with clutch,jaws115,1115 of the sliding clutch 'memberilll l, the latter'being feathered on'the 'sha'ft63. A, pinion 117 is carried onthe sleeve 113 andiismeshed .withspur gear 118 keyed on I one end of;thescountergshaft119; his shaft is ijournaled in the brackets 65 and 65 trated,;except' as particularly limited LIn a inining'-machine,- a

together with the gear 118,]shaft119 and bodied, it will be'understood that the construction and arrangement of the various parts may be altered without departing from the spirit and sc-ope'of my'invention. I. do

not wish, therefore, to be understood as limitingmyself to the specific construction illusin the appendedclaims. v, a w

I claim as my invention:

table on said'base, a cutting element sup ported for Vertical movement on a plurality of uprights spaced apart on said turntable,

"said cutting element comprising a cutter arm at the forward end of said frame, a motor at the rear end of said frame and detachable connections thereto, permitting rearward withdrawal of said motor and supporting connections mounted on.said frame for en- 7 gagemen't with said upright supports.

2; In a mining machme, a base, a turntable on saidbase; a cutting element supported for vertical movement on aIplurality of uprights spaced apart on said turntable,said cutting motor, and supporting oonnections on said projections adapted for engagement with element supported for vertical movement on clement comprisinga frame having a cutter arm projectingfrom the forward end thereof, said frame having engagement with sand upright supports, and a motor detachably connected. at the rear'endof'the-frame and extending forwardlyand rearwardly of the rea'rmost supporting connections on said frame. 7, i

'3'. Ina mining machine, a base, a turntable on said base, a cuttmgelement supportedrfor vertical-movement on a plurality of uprights spaced apart on said turntable, said cutting element comprising a frame having a cutter arm at the forward end thereof, a

motor at the rear end of said frame, andde tachable connections forsald motor comprising pair of projections integral with said frame andfextendmg on oppositesides of-sald the rearmost supports on, saidbase.

4." In a'mining machine, a base, a cutting aplurality' of uprights spaced apart on said base, said cutting element comprisinga frame,

7 a cutter arm'at the forward end thereof, pinions on each si'de'of said frame adapted for engagement with vertically dlsposed racks on said uprights for elevating said cutting element with respect to the'base, and a motor at the rear end of said frame having intermediate operative connections selectivelywith base, a turnsaid cutting element or said elevating pinions;

5.-In a mining machine, a base, a cutting element supported for vertical" movement on a plurality of uprights spacedapart on I said base, said cutting element comprising",

a frame, a cutter arnratthe: forward end v thereof, pinions on each side Oi SLlCl frame adapted for engagement-with vertically disposed racks on'said uprights for elevating said cuttlng element wlth respect to'the base, and Ya motor at the rear end of said frame having intermediate operative connections selectively with said cutting element and with said elevating pinions, said motor eX-' tending forwardly and rearwardly of the-' rearmost elevatingpinions.

. 6. In a=mining machine, a base,a cuttin element supported for vertical movement on a plurality of uprights spaced apart on said base, said cutting element beingprovided "with elevating mechanism comprismga pair of elevating shafts onvopposite sides of said cutting element, pinions on said shafts en-r gaging vertically disposed racks on the upright supports, and bearing means for. said-4 o shafts splitrvon a vertical plane and detachable laterally therefrom.

element supported for vertical movement on a plurality of uprights spaced apart on said frame, a cutter arm having a-pair of'spaced; longitudinal channel beams adapted to register with longitudinally disposed" bearing surfaces on the front end of said frame in! cluding a centrally disposed projection fit- ;ting between said beams,'other' projections 'fitt-Hlg' inf saidchannel'beams, andsecuring 'means for said cutter arm'comprising a pair of longitudinally arranged plates bearing on. the outer surfaceslof said channel members, and bolts passing through said plates and channel members and'securedfin said frame;

'8. Ina mining machine, a base, abutting element supported for vertical movement on;-

7. In a mining machine, a base, acutting a base, said cuttmg element 'comprismg a J a plurality of uprights space'daparton said base, said" cutting element comprising. a'

longitudinal channel beams adapted toregister with longitudinally disposed bearing: surfaces on the front'end of said frame including a centrally disposed projection fitting between said beams, vother projections frame, a cutter arm having a pair of spaced fittingrin said, channel beams,iand securing a means for said cutter arm comprising a pair oflongitudinally arranged plates bearing on the outer surfaces of said channel members, and bolts passingthrough saidfplates and frame, said channel members being provided withlongitudinally disposed slots for adjustment of said cutter arm. I a

9, In a mining machine, a base provided ,withsupporting axles andwheel's, a cutting element vsupported on saidbase, means for' channel members and threaded in said 1 moving said cutting element angularly with i respect to said base to feed the same, other feeding means comprising flexible draft means including a rotating drum therefor, a motor on said base, means operable selec- 1 tively to feed the cutter arm angularly on said base or to rotate said drum, said means vincluding a friction device interposed between said selective means and said motor,

and locking means interposed between said selective means and said angular feeding mechanism whereby the cutting element may v be positively locked against angular movetable on said base, a cutting element sup-' ment with respect to said base.

10. In a mining machine, a base, a turnported on aplurality of uprights spaced apart on said turntable, said cutting element comprising a frame, a motor detachably connected to the rear end of said frame and permitting rearward withdrawal therefrom,

' and a cutter arm extending at the'front end of said frame and 'ofiset vertically from the longitudinal axis thereof, said cutter arm having operative connections With said motor, said cutting element being bodil invertible in said; uprights to out in di eren horizontal planes. 7 V

11. In a mining machine, a base, a turntable on said base, a cutting elementsupported for vertical movement on a plurality of uprights spaced apart on said turntable,

motor detachably connected to the rear end dravval therefrom, and a cutter arm extending at the front end of said frame and offset said cutting element comprising a frame, a

of said frame and permitting rearward Withvertically' from the longitudinal axis thereof,

said cutter arm having operative connections .bodily invertiblein said uprights to cut in difierent horizontal planes. r

Signed at Ghicago,in the county of Cook and State of Illinois, this 27th day of December, A. D. 1923. v

p EDWABDJ. DOBERSTEIN. 

